#include <stdio.h>

int main()
{
    int n,a,b;
    printf("There are following numbers with 4 digits satisfied condition:\n");
    for(n = 1000;n < 10000;n++)
    {
        a = n / 100;
        b = n % 100;
        if((a + b)*(a + b) == n)
        printf(" %d",n);
    }
    printf("\n");
}